A collection of attribute key/value pairs on the event.
OptionaldroppedThe number of dropped attributes. If the value is 0, then no attributes were dropped.
The name of the event. This field is semantically required to be set to non-empty string.
The time the event occurred (UNIX Epoch time in nanoseconds).
Event is a time-stamped annotation of the span, consisting of user-supplied text description and key-value pairs.